16397433501 has 4 divisors (see below), whose sum is σ = 21863244672. Its totient is φ = 10931622332.

The previous prime is 16397433499. The next prime is 16397433529. The reversal of 16397433501 is 10533479361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16397433501 - 2¹ = 16397433499 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16397433551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732905581 + ... + 2732905586.

It is an arithmetic number, because the mean of its divisors is an integer number (5465811168).

Almost surely, 2^16397433501 is an apocalyptic number.

It is an amenable number.

16397433501 is a deficient number, since it is larger than the sum of its proper divisors (5465811171).

16397433501 is an equidigital number, since it uses as much as digits as its factorization.

16397433501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465811170.

The product of its (nonzero) digits is 204120, while the sum is 42.

The spelling of 16397433501 in words is "sixteen billion, three hundred ninety-seven million, four hundred thirty-three thousand, five hundred one".